关于restTemplate的get和post请求，header设置及传参方式
@Autowired
private RestTemplate restTemplate
String url="/v3/weather/weatherInfo?city=110101&key=3ff9482454cb60bcb73f65c8c48d4209](/v3/weather/weatherInfo?city=110101&key=3ff9482454cb60bcb73f65c8c48d4209)";
//无参 不用指定header的请求
JSONObect jsonobject=restTemplate.getForObject(url,JSONObject.class);
//无参指定header的请求
HttpHeaders headers = new HttpHeaders();
headers.set("Accept", "application/json");
HttpEntity<JSONObject> httpEntity = new HttpEntity<>( headers);
JSONObject jsonobject=restTemplate.getForObject(url,JSONObject.class,httpEntity);
//指定header
HttpHeaders headers = new HttpHeaders();
headers.set("mdmAppId", mdmAppId);
headers.set("mdmToken", mdmToken);
log.info("tyccompstafflistUrl request headers {}",headers);
HttpEntity<JSONObject> httpEntity = new HttpEntity<>( headers);
ResponseEntity<JSONObject> exchange = restTemplate.exchange(tyccompbase, HttpMethod.GET, httpEntity, JSONObject.class);
JSONObject jsonObject = exchange.getBody();
//有参，param方式的参数【参数是拼接在url路径上】
Map<String, Object> params = new HashMap<>();
params.put("param1", "value1");
params.put("param2", "value2");
JSONObject jsonobject=restTemplate.getForObject(url,JSONObject.class,params);
//有参，请求体body中json【较少见，调用方式如下：】
因为restTemplate默认使用的jdk的requestfactory，这种方式不支持get请求这样的传参，故需要将restTemplate的requestfactory设置为自定义的requestfactory继承HttpEntityEnclosingRequestBase具体如下：
private static final class HttpComponentsClientHttpRequestWithBodyFactory extends HttpComponentsClientHttpRequestFactory {
@Override
protected HttpUriRequest createHttpUriRequest(HttpMethod httpMethod, URI uri) {
if (httpMethod == HttpMethod.GET) {
return new HttpGetRequestWithEntity(uri);
}
return super.createHttpUriRequest(httpMethod, uri);
}
}
private static final class HttpGetRequestWithEntity extends HttpEntityEnclosingRequestBase {
public HttpGetRequestWithEntity(final URI uri) {
super.setURI(uri);
}
@Override
public String getMethod() {
return HttpMethod.GET.name();
}
}
此种方式下的调用
String temp="";//参数的json串
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.set("Accept", "application/json");
HttpEntity<JSONObject> httpEntity = new HttpEntity(temp, headers);
RestTemplate restTemplate = new RestTemplate();
restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestWithBodyFactory());//或者在注入之前set该requestfactory
ResponseEntity<String> exchange = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class);
String body = exchange.getBody();